:root {
  color-scheme: light;
  --ink: #0d0d0f;
  --ink-2: #3a3a3f;
  --muted: #6b6b72;
  --paper: #f5f5f6;
  --surface: #ffffff;
  --surface-soft: #f0f0f2;
  --line: rgba(17,17,20,.10);
  --blue: #2b50f0;
  --blue-dark: #1e3fd0;
  --border: #c7c7cc;
  --border-soft: #d2d2d7;
  --header-bg: rgba(245,245,246,.94);
  --poster-start: #e4e4e7;
  --poster-end: #f4f4f5;
  --disabled: #b4b4ba;
  --viewer-stage: #e8e8eb;
  --fallback: #f5f5f6;
  --body-glow-a: rgba(223,223,223,.38);
  --body-glow-b: rgba(90,90,90,.10);
  --blue-shadow: rgba(43,80,240,.18);
  --focus-ring: rgba(43,80,240,.20);
  --card-shadow: rgba(17,17,20,.07);
  --hf-icon: #d68700;
  --arxiv-icon: #b31b1b;
  --nav-accent: #6c5ce7;
  --shared-font-sans: "Inter var", Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@font-face {
  font-family: "Inter var";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/InterVariable.woff2?v=4.1") format("woff2");
}
* { box-sizing: border-box; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, var(--body-glow-a), transparent 30rem),
    radial-gradient(circle at 94% 22%, var(--body-glow-b), transparent 32rem),
    var(--paper);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.topbar-wrap { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid color-mix(in srgb, #e6e8ef 70%, transparent); background: color-mix(in srgb, #fff 75%, transparent); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); }
.topbar { max-width: 1180px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 24px; font-family: var(--shared-font-sans); font-feature-settings: "cv11", "ss01", "ss03"; line-height: 1.55; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #0b1020; text-decoration: none; font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand-logo { display: block; width: 28px; height: 28px; border-radius: 0; }
.nav-links { display: flex; flex: 1; align-items: center; gap: 22px; margin: 0 0 0 16px; padding: 0; list-style: none; }
.nav-links li { display: inline-flex; }
.nav-links a { padding: 0; color: #555a6a; text-decoration: none; font-size: 14.5px; font-weight: 500; white-space: nowrap; transition: color .15s ease; }
.nav-links a:hover { color: #0b1020; text-decoration: none; }
.nav-links a.active { color: var(--nav-accent); font-weight: 500; }
.nav__cta { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.github-link { width: 173.02px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 18px; border: 1px solid #d3d7e0; border-radius: 999px; color: #0b1020; background: #fff; text-decoration: none; font-size: 14.5px; font-weight: 600; white-space: nowrap; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease, border-color .15s ease; }
.github-link:hover { background: #f7f8fb; text-decoration: none; transform: translateY(-1px); }
.github-link svg { flex-shrink: 0; }
main { width: min(1180px, 90vw); margin: 0 auto; padding: 52px 0 90px; }
.hero { margin-bottom: 38px; }
.title-row { position: relative; left: 50%; width: min(1320px, 100vw); display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; padding: 0 32px; transform: translateX(-50%); }
.title-copy { flex: 1; min-width: 0; }
h1 { margin: 0; max-width: 820px; font-size: clamp(2.4rem, 5vw, 4.8rem); font-weight: 760; line-height: .98; letter-spacing: -.045em; }
.intro { max-width: 800px; margin: 22px 0 0; color: var(--muted); line-height: 1.55; }
.intro p { margin: 0; }
.intro-detail { margin-top: 8px !important; font-size: 1.02rem; }
.intro-detail span { display: block; }
.intro-lead { color: var(--ink-2); font-size: clamp(1.12rem, 2vw, 1.35rem); font-weight: 570; }
.intro-detail strong { color: var(--ink-2); font-weight: 780; }
.reels-accent { color: var(--blue); font-weight: 850; text-decoration: none; text-decoration-thickness: .08em; text-underline-offset: .16em; }
.reels-accent:hover { color: var(--blue-dark); text-decoration-line: underline; }
.github-stars-badge { box-sizing: border-box; width: 124px; height: 26px; display: inline-flex; align-items: center; justify-content: center; gap: 5px; margin-left: 5px; padding: 4px 7px; border: 1px solid rgba(74,74,74,.2); border-radius: 4px; color: #606060; background: rgba(255,255,255,.74); font-family: "SFMono-Regular", Consolas, monospace; font-size: .68rem; line-height: 1; text-decoration: none; vertical-align: middle; transition: border-color .15s, color .15s, background .15s, transform .15s; }
.github-stars-badge[hidden] { display: none; }
.github-stars-badge .gh-mark { flex: none; width: 14px; height: 14px; color: currentColor; }
.github-stars-badge .gh-star { flex: none; width: 13px; height: 13px; fill: #ffd60a; stroke: #ff9f0a; stroke-width: 1.2; stroke-linejoin: round; filter: drop-shadow(0 0 4px rgba(255,214,10,.7)); }
.github-stars-badge strong { display: inline-block; color: #373737; font-size: .72rem; font-weight: 750; }
.github-stars-badge strong.is-updated { animation: github-star-update .5s ease-out; }
.github-stars-badge:hover { border-color: var(--blue); color: var(--ink); background: var(--surface); text-decoration: none; transform: translateY(-1px); }
@keyframes github-star-update { 0% { color: #111; text-shadow: 0 0 10px rgba(43,80,240,.25); transform: translateY(-1px); } 100% { color: #373737; text-shadow: none; transform: translateY(0); } }
.trending-cta { flex: 0 0 auto; position: relative; overflow: hidden; width: 340px; max-width: 340px; display: flex; align-items: center; gap: 14px; padding: 16px 20px; border: 0; border-radius: 16px; color: white; background: linear-gradient(135deg,#6c5ce7 0%,#00d4a8 100%); box-shadow: 0 14px 32px -10px color-mix(in srgb,#6c5ce7 65%,transparent), 0 4px 12px -4px color-mix(in srgb,#00d4a8 45%,transparent); font-family: var(--shared-font-sans); font-feature-settings: "cv11", "ss01", "ss03"; line-height: 1.55; text-decoration: none; transition: transform .2s, box-shadow .2s; }
.trending-cta:hover { color: white; text-decoration: none; transform: translateY(-3px) scale(1.02); box-shadow: 0 20px 46px -10px color-mix(in srgb,#6c5ce7 78%,transparent), 0 8px 18px -4px color-mix(in srgb,#00d4a8 55%,transparent); }
.trending-cta::before { content: ""; position: absolute; top: 0; left: -60%; width: 38%; height: 100%; background: linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent); transform: skewX(-18deg); animation: trending-cta-shine 3.4s ease-in-out infinite; }
@keyframes trending-cta-shine { 0%,58% { left: -60%; } 100% { left: 135%; } }
.trending-cta-icon { position: relative; z-index: 1; flex: 0 0 auto; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: rgba(255,255,255,.22); font-size: 23px; }
.trending-cta-copy { position: relative; z-index: 1; min-width: 0; display: flex; flex-direction: column; }
.trending-cta-badge { align-self: flex-start; display: inline-flex; align-items: center; gap: 5px; margin-bottom: 4px; padding: 2px 8px; border-radius: 999px; background: rgba(255,255,255,.22); font-size: 9.5px; font-weight: 800; letter-spacing: .7px; text-transform: uppercase; }
.trending-cta-dot { width: 6px; height: 6px; border-radius: 50%; background: white; animation: trending-cta-pulse 1.6s infinite; }
@keyframes trending-cta-pulse { 0% { box-shadow: 0 0 0 0 rgba(255,255,255,.65); } 70% { box-shadow: 0 0 0 7px rgba(255,255,255,0); } 100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); } }
.trending-cta-title { color: white; font-size: 15.5px; font-weight: 800; letter-spacing: -.2px; line-height: 1.2; }
.trending-cta-subtitle { margin-top: 3px; color: rgba(255,255,255,.85); font-size: 12px; line-height: 1.35; }
.trending-cta-arrow { position: relative; z-index: 1; flex: 0 0 auto; color: white; transition: transform .2s; }
.trending-cta:hover .trending-cta-arrow { transform: translate(3px,-3px); }
.catalog-controls { display: flex; width: 100%; max-width: 100%; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.edition-toolbar { flex: 0 0 auto; margin-top: 0; display: flex; align-items: center; gap: 14px; }
.mode-switch { display: inline-flex; flex: 0 0 auto; padding: 4px; border: 1px solid var(--border-soft); border-radius: 11px; background: var(--surface-soft); }
.mode-switch button { min-width: 82px; padding: 8px 14px; border: 0; border-radius: 8px; color: var(--muted); background: transparent; font: inherit; font-size: .86rem; font-weight: 750; cursor: pointer; }
.mode-switch button[aria-pressed="true"] { color: white; background: var(--blue); box-shadow: 0 2px 8px var(--blue-shadow); }
.edition-control { display: inline-grid; grid-template-columns: 40px minmax(170px,auto) 40px; align-items: stretch; overflow: hidden; border: 1px solid var(--border-soft); border-radius: 11px; background: var(--surface); box-shadow: 0 1px 2px var(--card-shadow); }
.edition-step { display: grid; place-items: center; min-height: 40px; padding: 0; border: 0; color: var(--ink-2); background: var(--surface-soft); font: 800 1.15rem/1 inherit; cursor: pointer; }
.edition-step:first-of-type { border-right: 1px solid var(--line); }
.edition-step:last-of-type { border-left: 1px solid var(--line); }
.edition-step:hover:not(:disabled) { color: white; background: var(--blue); }
.edition-step:disabled { color: var(--disabled); cursor: default; }
select { min-width: 180px; padding: 10px 14px; border: 0; border-radius: 0; appearance: none; background: var(--surface); color: var(--ink); font: inherit; font-size: .86rem; font-weight: 750; text-align: center; text-align-last: center; cursor: pointer; }
.mode-switch button:focus-visible, .edition-step:focus-visible, select:focus-visible, .sort-toggle:focus-visible, .brand:focus-visible, .nav-links a:focus-visible, .github-link:focus-visible, .reels-accent:focus-visible, .github-stars-badge:focus-visible, .trending-cta:focus-visible, .metadata-chip:focus-visible { position: relative; z-index: 1; outline: 3px solid var(--focus-ring); outline-offset: 2px; }
.catalog-toolbar { flex: 1 1 488px; min-width: 0; width: auto; display: grid; grid-template-columns: minmax(260px,1fr) auto; gap: 12px; margin-top: 0; }
.search-control, .sort-control { min-height: 44px; border: 1px solid var(--border-soft); border-radius: 11px; background: var(--surface); box-shadow: 0 1px 2px var(--card-shadow); }
.search-control { display: flex; align-items: center; gap: 9px; padding: 0 13px; }
.search-icon { flex: 0 0 auto; width: 17px; height: 17px; color: var(--muted); }
.search-control input { width: 100%; min-width: 0; padding: 10px 0; border: 0; outline: 0; color: var(--ink); background: transparent; font: inherit; font-size: .9rem; }
.search-control input::placeholder { color: var(--muted); opacity: 1; }
.sort-control { display: inline-flex; align-items: center; gap: 4px; padding: 4px; background: var(--surface-soft); }
.sort-label { flex: 0 0 auto; padding: 0 9px; color: var(--muted); font-size: .7rem; font-weight: 800; letter-spacing: .065em; text-transform: uppercase; }
.sort-toggle { min-width: 88px; min-height: 34px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 7px 11px; border: 1px solid transparent; border-radius: 8px; color: var(--muted); background: transparent; box-shadow: none; font: inherit; opacity: .68; cursor: pointer; transition: border-color .15s ease, box-shadow .15s ease, color .15s ease, background .15s ease, opacity .15s ease, transform .15s ease; }
.sort-toggle-votes { min-width: 116px; }
.sort-toggle-date { min-width: 88px; }
.sort-toggle[aria-pressed="true"] { border-color: var(--line); color: var(--ink-2); background: var(--surface); box-shadow: 0 1px 2px var(--card-shadow); opacity: 1; }
.sort-toggle:hover { border-color: var(--border); color: var(--ink); background: var(--surface); box-shadow: 0 3px 9px var(--card-shadow); opacity: 1; transform: translateY(-1px); }
.sort-toggle:active { transform: translateY(0); }
.sort-hf-mark { flex: 0 0 auto; width: 17px; height: 17px; }
.sort-toggle[aria-pressed="false"] .sort-hf-mark { opacity: .48; filter: grayscale(1); }
.sort-toggle-label { font-size: .82rem; font-weight: 780; letter-spacing: -.01em; }
.sort-arrows { width: 9px; display: inline-grid; justify-items: center; gap: 3px; color: var(--ink); }
.sort-arrow { width: 0; height: 0; opacity: .22; transition: opacity .15s ease, transform .15s ease; }
.sort-arrow-up { border-right: 4px solid transparent; border-bottom: 5px solid currentColor; border-left: 4px solid transparent; }
.sort-arrow-down { border-top: 5px solid currentColor; border-right: 4px solid transparent; border-left: 4px solid transparent; }
.sort-toggle[aria-pressed="true"][data-sort$="-desc"] .sort-arrow-up,
.sort-toggle[aria-pressed="true"][data-sort$="-asc"] .sort-arrow-down { opacity: .92; transform: scale(1.08); }
.search-control:focus-within, .sort-control:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px var(--focus-ring); }
.paper-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 28px; }
.paper-grid[hidden], .paper-card[hidden] { display: none; }
.paper-card.is-stream-entering { transform-origin: 50% 100%; will-change: opacity, filter, transform; animation: paper-stream-enter .72s cubic-bezier(.16,1,.3,1) both; animation-delay: calc(var(--stream-order, 0) * 110ms); }
@keyframes paper-stream-enter { from { opacity: 0; filter: blur(3px); transform: translateY(38px) scale(.975); } to { opacity: 1; filter: blur(0); transform: translateY(0) scale(1); } }
.paper-stream-sentinel { min-height: 58px; display: flex; align-items: center; justify-content: center; gap: 9px; color: var(--muted); font-size: .74rem; font-weight: 680; }
.paper-stream-sentinel[hidden] { display: none; }
.paper-stream-dots { display: inline-flex; align-items: center; gap: 4px; }
.paper-stream-dots i { width: 5px; height: 5px; border-radius: 50%; background: var(--blue); animation: paper-stream-pulse .9s ease-in-out infinite alternate; }
.paper-stream-dots i:nth-child(2) { animation-delay: .14s; }
.paper-stream-dots i:nth-child(3) { animation-delay: .28s; }
@keyframes paper-stream-pulse { from { opacity: .28; transform: translateY(1px); } to { opacity: .92; transform: translateY(-2px); } }
.paper-card { position: relative; overflow: hidden; display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); box-shadow: 0 8px 28px var(--card-shadow); }
.poster-shell { position: relative; aspect-ratio: 2016 / 1210; overflow: hidden; border-radius: 17px 17px 0 0; background: linear-gradient(145deg, var(--poster-start), var(--poster-end)); }
.poster-link { position: absolute; inset: 0; display: block; overflow: hidden; }
.poster { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform .25s ease, filter .2s ease; }
.poster-link:hover .poster { transform: scale(1.015); }
.paper-body { padding: 24px; }
.metadata-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .76rem; }
.metadata-chip { display: inline-flex; align-items: center; gap: 5px; min-height: 27px; padding: 4px 8px; border: 1px solid var(--border-soft); border-radius: 999px; color: var(--ink-2); background: var(--surface-soft); text-decoration: none; font-weight: 760; font-variant-numeric: tabular-nums; letter-spacing: 0; transition: color .15s ease, border-color .15s ease, background .15s ease; }
.metadata-chip:hover { border-color: var(--blue); color: var(--blue); background: var(--surface); }
.github-chip[hidden] { display: none; }
.paper-published { margin-left: auto; color: var(--muted); font-size: .74rem; font-weight: 620; font-variant-numeric: tabular-nums; white-space: nowrap; }
.brand-inline-icon, .github-mark { flex: 0 0 auto; width: 14px; height: 14px; }
.brand-inline-icon { display: inline-block; background: currentColor; -webkit-mask-position: center; mask-position: center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-size: contain; mask-size: contain; }
.hf-mark { color: var(--hf-icon); -webkit-mask-image: url("icons/huggingface.svg"); mask-image: url("icons/huggingface.svg"); }
.arxiv-mark { color: var(--arxiv-icon); -webkit-mask-image: url("icons/arxiv.svg"); mask-image: url("icons/arxiv.svg"); }
.metadata-chip:hover .hf-mark, .metadata-chip:hover .arxiv-mark { color: var(--blue); }
.github-star-count, .hf-vote-count, .paper-id { font-size: .74rem; font-weight: 760; }
.paper-title-wrap { position: relative; margin-top: 12px; }
.paper-title { display: -webkit-box; overflow: hidden; margin: 0; font-size: 1.35rem; font-weight: 760; line-height: 1.22; letter-spacing: -.015em; text-overflow: ellipsis; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; }
.paper-title-tooltip { position: absolute; top: 0; right: 0; bottom: auto; left: 0; z-index: 4; margin: 0; padding: 11px 13px; border: 1px solid rgba(255,255,255,.16); border-radius: 10px; color: #fff; background: rgba(22,24,30,.96); box-shadow: 0 14px 36px rgba(0,0,0,.28); font-size: .86rem; font-weight: 650; line-height: 1.4; letter-spacing: 0; opacity: 0; visibility: hidden; transform: translateY(6px); pointer-events: none; transition: opacity .18s ease, visibility .18s ease, transform .18s ease; }
@media (hover: hover) and (pointer: fine) {
  .paper-card.has-clamped-title:hover { overflow: visible; z-index: 5; }
  .paper-card.has-clamped-title:hover .paper-title-tooltip { opacity: 1; visibility: visible; transform: translateY(0); }
}
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 8px 13px; border: 1px solid var(--border); border-radius: 9px; text-decoration: none; font-size: .84rem; font-weight: 700; }
.button:hover { border-color: var(--blue); }
.message-card { padding: 46px; border: 1px dashed var(--border); border-radius: 18px; color: var(--muted); text-align: center; background: var(--surface); }
.paper-viewer { overflow: hidden; width: 100vw; max-width: none; height: 100vh; max-height: none; margin: 0; padding: 0; border: 0; background: var(--paper); }
.paper-viewer::backdrop { background: rgba(13,13,15,.55); }
.viewer-shell { display: grid; grid-template-rows: auto minmax(0,1fr); width: 100%; height: 100%; }
.viewer-header { min-height: 76px; display: grid; grid-template-columns: 110px minmax(0,1fr) auto auto; align-items: center; gap: 20px; padding: 10px 24px; border-bottom: 1px solid var(--line); background: var(--surface); }
.viewer-back { justify-self: start; border: 0; color: var(--blue); background: transparent; font: inherit; font-weight: 720; cursor: pointer; }
.viewer-heading { min-width: 0; text-align: left; }
.viewer-heading span { color: var(--blue); font-size: .7rem; font-weight: 760; text-transform: uppercase; letter-spacing: .12em; }
.viewer-heading h2 { overflow: hidden; margin: 4px 0 0; font-size: 1.12rem; font-weight: 760; white-space: nowrap; text-overflow: ellipsis; }
.viewer-actions { display: flex; align-items: center; justify-content: flex-end; gap: 9px; }
.viewer-external { display: inline-flex; min-height: 38px; align-items: center; padding: 8px 13px; border-radius: 9px; color: white; background: var(--blue); text-decoration: none; font-size: .82rem; font-weight: 720; white-space: nowrap; }
.viewer-tabs { display: inline-flex; padding: 4px; border-radius: 10px; background: var(--surface-soft); }
.viewer-tabs button { min-width: 92px; padding: 8px 18px; border: 0; border-radius: 7px; color: var(--muted); background: transparent; font: inherit; font-size: .86rem; font-weight: 720; cursor: pointer; }
.viewer-tabs button[aria-selected="true"] { color: white; background: var(--blue); }
.viewer-stage { position: relative; min-height: 0; background: var(--viewer-stage); }
.viewer-stage section { width: 100%; height: 100%; border: 0; }
.viewer-stage iframe { display: block; width: 100%; height: 100%; border: 0; }
#paper-panel { display: grid; grid-template-rows: auto minmax(0,1fr); }
#paper-panel[hidden] { display: none; }
.pdf-fallback { padding: 8px 18px; color: var(--muted); background: var(--fallback); border-bottom: 1px solid var(--line); text-align: center; font-size: .78rem; }
.pdf-fallback a { color: var(--blue); font-weight: 700; }
.viewer-loading { position: absolute; inset: 0; z-index: 2; display: grid; place-items: center; color: var(--muted); background: var(--paper); }
.viewer-loading[hidden] { display: none; }
body.viewer-open { overflow: hidden; }
.site-footer {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
.footer-inner {
  width: min(1180px, 90vw);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "brand links" "notice notice" "meta meta" "source source";
  align-items: center;
  gap: 18px 28px;
  margin: 0 auto;
  padding: 26px 4px 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .72rem;
}
.footer-brand {
  grid-area: brand;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.footer-brand span { color: var(--ink-2); font-size: .78rem; font-weight: 800; }
.footer-brand p { margin: 0; color: var(--muted); font-size: .72rem; }
.footer-links {
  grid-area: links;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 16px;
}
.footer-links a {
  color: var(--muted);
  font-size: .66rem;
  font-weight: 700;
  text-decoration: none;
  transition: color .15s ease;
}
.footer-links a:hover { color: var(--blue); }
.footer-notice {
  grid-area: notice;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  font-size: .7rem;
  line-height: 1.55;
}
.footer-notice span { margin-right: 6px; color: var(--blue); }
.footer-meta {
  grid-area: meta;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  color: var(--muted);
  font-size: .65rem;
}
.footer-meta a, .footer-source a {
  color: var(--muted);
  text-decoration: none;
  transition: color .15s ease;
}
.footer-meta a:hover, .footer-source a:hover { color: var(--blue); }
.footer-support { text-align: center; }
.footer-source {
  grid-area: source;
  margin: -8px 0 0;
  color: var(--muted);
  font-size: .65rem;
}
@media (max-width: 1540px) {
  .topbar { padding-right: clamp(24px, calc(776px - 50vw), 190px); }
}
@media (max-width: 1024px) {
  .nav-links { display: none; }
}
@media (max-width: 820px) {
  .title-row { flex-direction: column; align-items: flex-start; }
  .trending-cta { width: 100%; max-width: none; }
}
@media (max-width: 780px) {
  main { width: min(92vw, 620px); }
  .paper-grid { grid-template-columns: 1fr; }
  .catalog-controls { flex-direction: column; align-items: stretch; }
  .edition-toolbar { width: 100%; align-items: flex-start; flex-wrap: wrap; }
  .mode-switch { width: 100%; }
  .mode-switch button { flex: 1; }
  .edition-control { flex: 1 1 auto; }
  .edition-control select { width: 100%; min-width: 0; }
  .catalog-toolbar { flex: 0 1 auto; width: 100%; grid-template-columns: 1fr; }
  .sort-toggle { flex: 1; min-width: 0; }
  .viewer-header { min-height: 104px; grid-template-columns: auto minmax(0,1fr) auto; grid-template-areas: "back heading actions" "tabs tabs tabs"; gap: 8px; padding: 8px 14px; }
  .viewer-back { grid-area: back; }
  .viewer-heading { grid-area: heading; text-align: center; }
  .viewer-tabs { grid-area: tabs; justify-self: center; }
  .viewer-actions { grid-area: actions; }
  .viewer-back, .viewer-external { font-size: 0; }
  .viewer-back span, .viewer-external span { font-size: 1.15rem; }
  .viewer-heading h2 { font-size: .9rem; }
  .viewer-actions { gap: 5px; }
  .viewer-actions .button { width: 36px; min-height: 36px; padding: 0; font-size: 0; }
  .viewer-actions .button::after { content: "Ask"; font-size: .68rem; letter-spacing: .02em; }
  .viewer-tabs button { min-width: 72px; padding: 7px 12px; }
  .footer-inner {
    grid-template-columns: 1fr;
    grid-template-areas: "brand" "links" "notice" "meta" "source";
    align-items: flex-start;
  }
  .footer-links { justify-content: flex-start; }
  .footer-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
  .footer-support { text-align: left; }
}
@media (max-width: 760px) {
  .topbar { padding-right: 140px; }
  main { padding-top: 38px; }
  .title-row { padding-right: 18px; padding-left: 18px; }
}
@media (max-width: 480px) {
  .topbar { gap: 12px; padding: 12px 140px 12px 16px; }
  .github-link { width: auto; gap: 0; padding: 8px 10px; }
  .github-link > span { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
}
@media (max-width: 520px) {
  .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .trending-cta::before, .trending-cta-dot, .paper-card.is-stream-entering, .paper-stream-dots i { animation: none; }
  .paper-title-tooltip { transition: none; }
}